Heap-based Buffer Overflow Affecting hdf5 package, versions [,1.14.4.3)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published22 Feb 2026
- disclosed20 Feb 2026
- creditDoI denandz
Introduced: 20 Feb 2026
CVE-2026-26200 (opens in a new tab)How to fix?
Upgrade hdf5 to version 1.14.4.3 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow via the H5T__conv_struct_opt function. An attacker can execute arbitrary code or cause a denial of service by supplying a specially crafted h5 file.